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https://www.readbyqxmd.com/read/28315285/effects-of-plyometric-training-on-physical-fitness-in-prepuberal-soccer-athletes
#1
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Mohamed Aymen Abbes, Younés Hachana, Urs Granacher
This study aimed at examining the effects of plyometric training on stable (SPT) vs. unstable (UPT) surfaces on physical fitness in prepuberal soccer players. Male athletes were randomly assigned to SPT (n=18; age=12.7±0.2 years) or UPT (n=16; age=12.2±0.5 years). Both groups conducted 3 regular soccer training sessions per week combined with either 2 SPT or UPT sessions. Assessment of jumping ability (countermovement jump [CMJ], and standing long jump [SLJ]), speed (10-m, 20-m, 30-m sprint), agility (Illinois agility test [IAT]), and balance (stable [SSBT], unstable [USBT] stork balance test; stable [SYBT], unstable [UYBT] Y balance test) was conducted pre-and post-training...
March 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28314994/amino-acids-intake-and-physical-fitness-among-adolescents
#2
Luis Gracia-Marco, Silvia Bel-Serrat, Magdalena Cuenca-Garcia, Marcela Gonzalez-Gross, Raquel Pedrero-Chamizo, Yannis Manios, Ascensión Marcos, Denes Molnar, Kurt Widhalm, Angela Polito, Jeremy Vanhelst, Maria Hagströmer, Michael Sjöström, Anthony Kafatos, Stefaan de Henauw, Ángel Gutierrez, Manuel J Castillo, Luis A Moreno
The aim was to investigate whether there was an association between amino acid (AA) intake and physical fitness and if so, to assess whether this association was independent of carbohydrates intake. European adolescents (n = 1481, 12.5-17.5 years) were measured. Intake was assessed via two non-consecutive 24-h dietary recalls. Lower and upper limbs muscular fitness was assessed by standing long jump and handgrip strength tests, respectively. Cardiorespiratory fitness was assessed by the 20-m shuttle run test...
March 17, 2017: Amino Acids
https://www.readbyqxmd.com/read/28303248/fitness-effects-of-10-month-frequent-low-volume-ball-game-training-or-interval-running-for-8-10-year-old-school-children
#3
Malte Nejst Larsen, Claus Malta Nielsen, Christina Ørntoft, Morten Bredsgaard Randers, Eva Wulff Helge, Mads Madsen, Vibeke Manniche, Lone Hansen, Peter Riis Hansen, Jens Bangsbo, Peter Krustrup
We investigated the exercise intensity and fitness effects of frequent school-based low-volume high-intensity training for 10 months in 8-10-year-old children. 239 Danish 3rd-grade school children from four schools were cluster-randomised into a control group (CON, n = 116) or two training groups performing either 5 × 12 min/wk small-sided football plus other ball games (SSG, n = 62) or interval running (IR, n = 61). Whole-body DXA scans, flamingo balance, standing long-jump, 20 m sprint, and Yo-Yo IR1 children's tests (YYIR1C) were performed before and after the intervention...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28297924/onset-of-anomalous-diffusion-from-local-motion-rules
#4
Sarah de Nigris, Timoteo Carletti, Renaud Lambiotte
Anomalous diffusion processes, in particular superdiffusive ones, are known to be efficient strategies for searching and navigation in animals and also in human mobility. One way to create such regimes are Lévy flights, where the walkers are allowed to perform jumps, the "flights," that can eventually be very long as their length distribution is asymptotically power-law distributed. In our work, we present a model in which walkers are allowed to perform, on a one-dimensional lattice, "cascades" of n unitary steps instead of one jump of a randomly generated length, as in the Lévy case, where n is drawn from a cascade distribution p_{n}...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28277683/hydration-shell-transformation-of-thermo-sensitive-aqueous-polymers
#5
Kenji Mochizuki, Dor Ben-Amotz
Although water plays a key role in the coil-globule transition of polymers and biomolecules, it is not clear if a change in water structure drives or follows polymer collapse. Here, we address this question by using Raman multivariate curve resolution (Raman-MCR) spectroscopy to investigate the hydration shell structure around poly(N-isopropylacrylamide) (PNIPAM) and poly(propyleneoxide) (PPO) both below and above the cloud point temperature at which the polymers collapse and form meso-scopic polymer-rich aggregates...
March 9, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28270619/massive-increase-in-visual-range-preceded-the-origin-of-terrestrial-vertebrates
#6
Malcolm A MacIver, Lars Schmitz, Ugurcan Mugan, Todd D Murphey, Curtis D Mobley
The evolution of terrestrial vertebrates, starting around 385 million years ago, is an iconic moment in evolution that brings to mind images of fish transforming into four-legged animals. Here, we show that this radical change in body shape was preceded by an equally dramatic change in sensory abilities akin to transitioning from seeing over short distances in a dense fog to seeing over long distances on a clear day. Measurements of eye sockets and simulations of their evolution show that eyes nearly tripled in size just before vertebrates began living on land...
March 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28270140/the-magnitude-of-muscular-activation-of-four-canine-forelimb-muscles-in-dogs-performing-two-agility-specific-tasks
#7
Kimberley L Cullen, James P Dickey, Stephen H M Brown, Stephanie G Nykamp, Leah R Bent, Jeffrey J Thomason, Noël M M Moens
BACKGROUND: The purpose of this study was to measure the muscular activation in four forelimb muscles while dogs performed agility tasks (i.e., jumping and A-frame) and to provide insight into potential relationships between level of muscular activation and risk of injury. Muscle activation in eight healthy, client-owned agility dogs was measured using ultrasound-guided fine-wire electromyography of four specific forelimb muscles: Biceps Brachii, Supraspinatus, Infraspinatus, and Triceps Brachii - Long Head, while dogs performed a two jump sequence and while dogs ascended and descended an A-frame obstacle at two different competition heights...
March 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28261066/ring-attractor-dynamics-emerge-from-a-spiking-model-of-the-entire-protocerebral-bridge
#8
Kyobi S Kakaria, Benjamin L de Bivort
Animal navigation is accomplished by a combination of landmark-following and dead reckoning based on estimates of self motion. Both of these approaches require the encoding of heading information, which can be represented as an allocentric or egocentric azimuthal angle. Recently, Ca(2+) correlates of landmark position and heading direction, in egocentric coordinates, were observed in the ellipsoid body (EB), a ring-shaped processing unit in the fly central complex (CX; Seelig and Jayaraman, 2015). These correlates displayed key dynamics of so-called ring attractors, namely: (1) responsiveness to the position of external stimuli; (2) persistence in the absence of external stimuli; (3) locking onto a single external stimulus when presented with two competitors; (4) stochastically switching between competitors with low probability; and (5) sliding or jumping between positions when an external stimulus moves...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28260531/defining-the-diverse-spectrum-of-inversions-complex-structural-variation-and-chromothripsis-in-the-morbid-human%C3%A2-genome
#9
Ryan L Collins, Harrison Brand, Claire E Redin, Carrie Hanscom, Caroline Antolik, Matthew R Stone, Joseph T Glessner, Tamara Mason, Giulia Pregno, Naghmeh Dorrani, Giorgia Mandrile, Daniela Giachino, Danielle Perrin, Cole Walsh, Michelle Cipicchio, Maura Costello, Alexei Stortchevoi, Joon-Yong An, Benjamin B Currall, Catarina M Seabra, Ashok Ragavendran, Lauren Margolin, Julian A Martinez-Agosto, Diane Lucente, Brynn Levy, Stephan J Sanders, Ronald J Wapner, Fabiola Quintero-Rivera, Wigard Kloosterman, Michael E Talkowski
BACKGROUND: Structural variation (SV) influences genome organization and contributes to human disease. However, the complete mutational spectrum of SV has not been routinely captured in disease association studies. RESULTS: We sequenced 689 participants with autism spectrum disorder (ASD) and other developmental abnormalities to construct a genome-wide map of large SV. Using long-insert jumping libraries at 105X mean physical coverage and linked-read whole-genome sequencing from 10X Genomics, we document seven major SV classes at ~5 kb SV resolution...
March 6, 2017: Genome Biology
https://www.readbyqxmd.com/read/28256848/localization-in-open-quantum-systems
#10
I Yusipov, T Laptyeva, S Denisov, M Ivanchenko
In an isolated single-particle quantum system, a spatial disorder can induce Anderson localization. Being a result of interference, this phenomenon is expected to be fragile in the face of dissipation. Here we show that a proper dissipation can drive a disordered system into a steady state with tunable localization properties. This can be achieved with a set of identical dissipative operators, each one acting nontrivially on a pair of sites. Operators are parametrized by a uniform phase, which controls the selection of Anderson modes contributing to the state...
February 17, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28246449/influence-of-training-and-competitive-sessions-on-peripheral-%C3%AE-endorphin-levels-in-training-show-jumping-horses
#11
Cristina Cravana, P Medica, G Ragonese, E Fazio
AIM: To investigate the effects of training sessions on circulating β-endorphin changes in sport horses before and after competition and to ascertain whether competition would affect this response. MATERIALS AND METHODS: A total of 24 trained jumping horses were randomly assigned to one of two training groups: Group A (competing) and Group B (not competing). To determined plasma β-endorphin concentrations, two pre- and post-competition training weeks at aerobic workout and two competitive show jumping event days at anaerobic workout were measured before, 5 and 30 min after exercise...
January 2017: Veterinary World
https://www.readbyqxmd.com/read/28242193/reforming-management-of-behavior-symptoms-and-psychiatric-conditions-in-long-term-care-facilities-a-different-perspective
#12
Steven A Levenson, Abhilash K Desai
Despite much attention including national initiatives, concerns remain about the approaches to managing behavior symptoms and psychiatric conditions across all settings, including in long-term care settings such as nursing homes and assisted living facilities. One key reason why problems persist is because most efforts to "reform" and "correct" the situation have failed to explore or address root causes and instead have promoted inadequate piecemeal "solutions." Further improvement requires jumping off the bandwagon and rethinking the entire issue, including recognizing and applying key concepts of clinical reasoning and the care delivery process to every situation...
February 24, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28195979/effects-of-high-intensity-interval-training-with-different-interval-durations-on-physical-performance-in-handball-players
#13
Jorge Viaño-Santasmarinas, Ezequiel Rey, Sergio Carballeira, Alexis Padrón-Cabo
The purpose of this study was to compare the effects of 2 high-intensity interval training protocols (HIIT) with different interval durations (short (SI) vs long (LI)), based on peak running velocity in 30-15 Intermittent Fitness Test (VIFT) in handball players. Eighteen highly trained players (age: 22.7±3.9 years; height: 181.5±6.6 cm; body mass: 84.7±14.1 kg) were randomly assigned to SI (2 sets of 22 intervals of 10-s runs at 95%VIFT) or LI (5 sets of 3 min intervals at 85% VIFT) group. The intervention program had to be carried out 2 times a week over 6 weeks...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28193312/leukocyte-and-skeletal-muscle-telomere-length-and-body-composition-in-monozygotic-twin-pairs-discordant-for-long-term-hormone-replacement-therapy
#14
Elina Sillanpää, Paula Niskala, Eija K Laakkonen, Elodie Ponsot, Markku Alén, Jaakko Kaprio, Fawzi Kadi, Vuokko Kovanen, Sarianna Sipilä
Estrogen-based hormone replacement therapy (HRT) may be associated with deceleration of cellular aging. We investigated whether long-term HRT has effects on leukocyte (LTL) or mean and minimum skeletal muscle telomere length (SMTL) in a design that controls for genotype and childhood environment. Associations between telomeres, body composition, and physical performance were also examined. Eleven monozygotic twin pairs (age 57.6 ± 1.8 years) discordant for HRT were studied. Mean duration of HRT use was 7.3 ± 3...
February 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#15
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28187195/a-multilevel-analysis-of-health-related-physical-fitness-the-portuguese-sibling-study-on-growth-fitness-lifestyle-and-health
#16
Sara Pereira, Peter Todd Katzmarzyk, Thayse Natacha Gomes, Michele Souza, Raquel Nichele Chaves, Fernanda Karina Dos Santos, Daniel Santos, Donald Hedeker, José Maia
This study investigates biological, behavioural and sociodemographic correlates of intra-pair similarities, and estimates sibling resemblance in health-related physical fitness (PF). The sample comprises 1101 biological siblings (525 females) aged 9-20 years. PF components and markers were: morphological [waist circumference (WC) and %body fat (%BF)], muscular [handgrip strength (GS) and standing long jump (SLJ)], motor [50-yard dash (50YD) and shuttle run (SR)], and cardiorespiratory (1-mile run). Biological maturation was assessed; physical activity (PA), TV viewing and socioeconomic status (SES) information was obtained...
2017: PloS One
https://www.readbyqxmd.com/read/28182510/the-effect-of-plyometric-training-volume-in-prepubertal-male-soccer-players-athletic-performance
#17
Helmi Chaabene, Yassine Negra
PURPOSE: The aim of this study was to assess and to compare the effects of 8-weeks in-season (2 sessions per-week) low and high-volume plyometric training (PT) on measures of physical fitness in prepubertal male soccer players. METHODS: A total of twenty-five soccer players were randomly assigned to low-volume plyometric training group (LPT; n=13; age = 12.68 ± 0.23 years; age at peak height velocity (APHV) = 14.25 ± 0.29 years, maturity-offset = -1.57 ± 0.29 years) and high-volume plyometric training group (HPT; n=12; age = 12...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28181775/precision-of-verbal-feedback-affects-accuracy-of-motor-skill-performance
#18
Mirosław Zalech, Zbigniew Bujak
BACKGROUND: The study sought to determine whether the precision of verbal feedback on knowledge of results affected the accuracy of motor skill performance with various parameters. METHODS: Eighty-eight male young healthy adults (21.55±1.13 years) participated in the study. They were randomly assigned to two groups (44 people each one). They had to perform standing long jump test. Three types of feedback and three distances that the participants jumped were used in the experiment...
February 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28176405/deficits-in-anthropometric-indices-of-nutritional-status-and-motor-performance-among-low-birth-weight-children-from-maputo-city-mozambique
#19
Mario Eugénio Tchamo, Marcos André Moura-Dos-Santos, Fernanda Karina Dos Santos, António Prista, Carol Góis Leandro
OBJECTIVE: To evaluate associations between low birth weight (LBW) and anthropometry, body composition, physical fitness, and gross motor coordination among schoolchildren from Maputo, Mozambique. METHODS: A total of 353 children aged 7 to 10 years old from both genders born in Maputo (Mozambique) were sampled. The sample was divided into two groups: LBW (n = 155) and normal birth weight (NBW, n = 198). Body composition measurements and indices weight-for-age, height-for-age, and weight-for-height were assessed...
February 8, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28171810/short-versus-long-small-sided-game-training-during-ramadan-in-soccer-players
#20
Hana Baklouti, Noureddine Rejeb, Asma Aloui, Hamdi Jaafar, Achraf Ammar, Hamdi Chtourou, Olivier Girard, Nizar Souissi
OBJECTIVE: To compare the effects of two small-sided game (SSG) training formats (4 × 4 min (SSG-S) and 2 × 8 min (SSG-L)) conducted during Ramadan on Hoff and five-jump (5JT) tests' performances and session rating of perceived exertion (sRPE). DESIGN: Three group, case-control. SETTING: Field tests. PARTICIPANTS: Twenty-four male soccer players were divided into 3 groups: 2 groups undertaking 4 weeks of SSG-S (n = 8) or SSG-L (n = 8) during Ramadan and a control group (n = 8)...
March 2017: Physical Therapy in Sport
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